basictreeui.java

JAVA 所有包

	    cellEditor = newEditor;
	    if(cellEditorListener == null)
		cellEditorListener = createCellEditorListener();
	    if(newEditor != null && cellEditorListener != null)
		newEditor.addCellEditorListener(cellEditorListener);
	    createdCellEditor = false;
	}
    }

    /**
      * Messaged from the tree we're in when the renderer has changed.
      */
    protected void updateRenderer() {
	if(tree != null) {
	    TreeCellRenderer      newCellRenderer;

	    newCellRenderer = tree.getCellRenderer();
	    if(newCellRenderer == null) {
		tree.setCellRenderer(createDefaultCellRenderer());
		createdRenderer = true;
	    }
	    else {
		createdRenderer = false;
		currentCellRenderer = newCellRenderer;
		if(createdCellEditor) {
		    tree.setCellEditor(null);
		}
	    }
	}
	else {
	    createdRenderer = false;
	    currentCellRenderer = null;
	}
	updateCellEditor();
    }

    /**
     * Resets the TreeState instance based on the tree we're providing the
     * look and feel for.
     */
    protected void configureLayoutCache() {
	if(treeState != null && tree != null) {
	    if(nodeDimensions == null)
		nodeDimensions = createNodeDimensions();
	    treeState.setNodeDimensions(nodeDimensions);
	    treeState.setRootVisible(tree.isRootVisible());
	    treeState.setRowHeight(tree.getRowHeight());
	    treeState.setSelectionModel(getSelectionModel());
	    // Only do this if necessary, may loss state if call with
	    // same model as it currently has.
	    if(treeState.getModel() != tree.getModel())
		treeState.setModel(tree.getModel());
	    updateLayoutCacheExpandedNodes();
	    // Create a listener to update preferred size when bounds
	    // changes, if necessary.
	    if(isLargeModel()) {
		if(componentListener == null) {
		    componentListener = createComponentListener();
		    if(componentListener != null)
			tree.addComponentListener(componentListener);
		}
	    }
	    else if(componentListener != null) {
		tree.removeComponentListener(componentListener);
		componentListener = null;
	    }
	}
	else if(componentListener != null) {
	    tree.removeComponentListener(componentListener);
	    componentListener = null;
	}
    }

    /**
     * Marks the cached size as being invalid, and messages the
     * tree with <code>treeDidChange</code>.
     */
    protected void updateSize() {
	validCachedPreferredSize = false;
	tree.treeDidChange();
    }

    private void updateSize0() {
        validCachedPreferredSize = false;
        tree.revalidate();
    }

    /**
     * Updates the <code>preferredSize</code> instance variable,
     * which is returned from <code>getPreferredSize()</code>.<p>
     * For left to right orientations, the size is determined from the
     * current AbstractLayoutCache. For RTL orientations, the preferred size
     * becomes the width minus the minimum x position.
     */
    protected void updateCachedPreferredSize() {
	if(treeState != null) {
	    Insets               i = tree.getInsets();

	    if(isLargeModel()) {
		Rectangle            visRect = tree.getVisibleRect();

                visRect.x -= i.left;
                visRect.y -= i.top;
                preferredSize.width = treeState.getPreferredWidth(visRect);
	    }
	    else {
                preferredSize.width = treeState.getPreferredWidth(null);
	    }
	    preferredSize.height = treeState.getPreferredHeight();
            preferredSize.width += i.left + i.right;
            preferredSize.height += i.top + i.bottom;
	}
	validCachedPreferredSize = true;
    }

    /**
      * Messaged from the VisibleTreeNode after it has been expanded.
      */
    protected void pathWasExpanded(TreePath path) {
	if(tree != null) {
	    tree.fireTreeExpanded(path);
	}
    }

    /**
      * Messaged from the VisibleTreeNode after it has collapsed.
      */
    protected void pathWasCollapsed(TreePath path) {
	if(tree != null) {
	    tree.fireTreeCollapsed(path);
	}
    }

    /**
      * Ensures that the rows identified by beginRow through endRow are
      * visible.
      */
    protected void ensureRowsAreVisible(int beginRow, int endRow) {
	if(tree != null && beginRow >= 0 && endRow < getRowCount(tree)) {
            boolean scrollVert = DefaultLookup.getBoolean(tree, this,
                              "Tree.scrollsHorizontallyAndVertically", false);
	    if(beginRow == endRow) {
		Rectangle     scrollBounds = getPathBounds(tree, getPathForRow
							   (tree, beginRow));

		if(scrollBounds != null) {
                    if (!scrollVert) {
                        scrollBounds.x = tree.getVisibleRect().x;
                        scrollBounds.width = 1;
                    }
		    tree.scrollRectToVisible(scrollBounds);
		}
	    }
	    else {
		Rectangle   beginRect = getPathBounds(tree, getPathForRow
						      (tree, beginRow));
		Rectangle   visRect = tree.getVisibleRect();
		Rectangle   testRect = beginRect;
		int         beginY = beginRect.y;
		int         maxY = beginY + visRect.height;

		for(int counter = beginRow + 1; counter <= endRow; counter++) {
		    testRect = getPathBounds(tree,
					     getPathForRow(tree, counter));
		    if((testRect.y + testRect.height) > maxY)
			counter = endRow;
		}
		tree.scrollRectToVisible(new Rectangle(visRect.x, beginY, 1,
						  testRect.y + testRect.height-
						  beginY));
	    }
	}
    }

    /** Sets the preferred minimum size.
      */
    public void setPreferredMinSize(Dimension newSize) {
	preferredMinSize = newSize;
    }

    /** Returns the minimum preferred size.
      */
    public Dimension getPreferredMinSize() {
	if(preferredMinSize == null)
	    return null;
	return new Dimension(preferredMinSize);
    }

    /** Returns the preferred size to properly display the tree,
      * this is a cover method for getPreferredSize(c, false).
      */
    public Dimension getPreferredSize(JComponent c) {
	return getPreferredSize(c, true);
    }

    /** Returns the preferred size to represent the tree in
      * <I>c</I>.  If <I>checkConsistancy</I> is true
      * <b>checkConsistancy</b> is messaged first.
      */
    public Dimension getPreferredSize(JComponent c,
				      boolean checkConsistancy) {
	Dimension       pSize = this.getPreferredMinSize();

	if(!validCachedPreferredSize)
	    updateCachedPreferredSize();
	if(tree != null) {
	    if(pSize != null)
		return new Dimension(Math.max(pSize.width,
					      preferredSize.width),
			      Math.max(pSize.height, preferredSize.height));
	    return new Dimension(preferredSize.width, preferredSize.height);
	}
	else if(pSize != null)
	    return pSize;
	else
	    return new Dimension(0, 0);
    }

    /**
      * Returns the minimum size for this component.  Which will be
      * the min preferred size or 0, 0.
      */
    public Dimension getMinimumSize(JComponent c) {
	if(this.getPreferredMinSize() != null)
	    return this.getPreferredMinSize();
	return new Dimension(0, 0);
    }

    /**
      * Returns the maximum size for this component, which will be the
      * preferred size if the instance is currently in a JTree, or 0, 0.
      */
    public Dimension getMaximumSize(JComponent c) {
	if(tree != null)
	    return getPreferredSize(tree);
	if(this.getPreferredMinSize() != null)
	    return this.getPreferredMinSize();
	return new Dimension(0, 0);
    }


    /**
     * Messages to stop the editing session. If the UI the receiver
     * is providing the look and feel for returns true from
     * <code>getInvokesStopCellEditing</code>, stopCellEditing will
     * invoked on the current editor. Then completeEditing will
     * be messaged with false, true, false to cancel any lingering
     * editing.
     */
    protected void completeEditing() {
	/* If should invoke stopCellEditing, try that */
	if(tree.getInvokesStopCellEditing() &&
	   stopEditingInCompleteEditing && editingComponent != null) {
	    cellEditor.stopCellEditing();
	}
	/* Invoke cancelCellEditing, this will do nothing if stopCellEditing
	   was successful. */
	completeEditing(false, true, false);
    }

    /**
      * Stops the editing session.  If messageStop is true the editor
      * is messaged with stopEditing, if messageCancel is true the
      * editor is messaged with cancelEditing. If messageTree is true
      * the treeModel is messaged with valueForPathChanged.
      */
    protected void completeEditing(boolean messageStop,
				   boolean messageCancel,
				   boolean messageTree) {
	if(stopEditingInCompleteEditing && editingComponent != null) {
	    Component             oldComponent = editingComponent;
	    TreePath              oldPath = editingPath;
	    TreeCellEditor        oldEditor = cellEditor;
	    Object                newValue = oldEditor.getCellEditorValue();
	    Rectangle             editingBounds = getPathBounds(tree, 
								editingPath);
	    boolean               requestFocus = (tree != null &&
		                   (tree.hasFocus() || SwingUtilities.
				    findFocusOwner(editingComponent) != null));

	    editingComponent = null;
	    editingPath = null;
	    if(messageStop)
		oldEditor.stopCellEditing();
	    else if(messageCancel)
		oldEditor.cancelCellEditing();
	    tree.remove(oldComponent);
	    if(editorHasDifferentSize) {
		treeState.invalidatePathBounds(oldPath);
		updateSize();
	    }
	    else {
		editingBounds.x = 0;
		editingBounds.width = tree.getSize().width;
		tree.repaint(editingBounds);
	    }
	    if(requestFocus)
		tree.requestFocus();
	    if(messageTree)
		treeModel.valueForPathChanged(oldPath, newValue);
	}
    }

    // cover method for startEditing that allows us to pass extra
    // information into that method via a class variable
    private boolean startEditingOnRelease(TreePath path,
                                          MouseEvent event,
                                          MouseEvent releaseEvent) {
        this.releaseEvent = releaseEvent;
        try {
            return startEditing(path, event);
        } finally {
            this.releaseEvent = null;
        }
    }

    /**
      * Will start editing for node if there is a cellEditor and
      * shouldSelectCell returns true.<p>
      * This assumes that path is valid and visible.
      */
    protected boolean startEditing(TreePath path, MouseEvent event) {
        if (isEditing(tree) && tree.getInvokesStopCellEditing() &&
                               !stopEditing(tree)) {
            return false;
        }
	completeEditing();
	if(cellEditor != null && tree.isPathEditable(path)) {
	    int           row = getRowForPath(tree, path);

	    if(cellEditor.isCellEditable(event)) {
                editingComponent = cellEditor.getTreeCellEditorComponent
		      (tree, path.getLastPathComponent(),
		       tree.isPathSelected(path), tree.isExpanded(path),
		       treeModel.isLeaf(path.getLastPathComponent()), row);
		Rectangle           nodeBounds = getPathBounds(tree, path);

		editingRow = row;

		Dimension editorSize = editingComponent.getPreferredSize();

		// Only allow odd heights if explicitly set.
		if(editorSize.height != nodeBounds.height &&
		   getRowHeight() > 0)
		    editorSize.height = getRowHeight();

		if(editorSize.width != nodeBounds.width ||
		   editorSize.height != nodeBounds.height) {
		    // Editor wants different width or height, invalidate 
		    // treeState and relayout.
		    editorHasDifferentSize = true;
		    treeState.invalidatePathBounds(path);
		    updateSize();
		}
		else
		    editorHasDifferentSize = false;
		tree.add(editingComponent);
		editingComponent.setBounds(nodeBounds.x, nodeBounds.y,
					   editorSize.width,
					   editorSize.height);
		editingPath = path;
		editingComponent.validate();

		Rectangle              visRect = tree.getVisibleRect();

		tree.paintImmediately(nodeBounds.x, nodeBounds.y,
				      visRect.width + visRect.x - nodeBounds.x,
				      editorSize.height);
		if(cellEditor.shouldSelectCell(event)) {
		    stopEditingInCompleteEditing = false;
		    try {
			tree.setSelectionRow(row);
		    } catch (Exception e) {
			System.err.println("Editing exception: " + e);
		    }
		    stopEditingInCompleteEditing = true;
		}

		Component focusedComponent = SwingUtilities2.
                                 compositeRequestFocus(editingComponent);
                boolean selectAll = true;
		
		if(event != null && event instanceof MouseEvent) {
		    /* Find the component that will get forwarded all the
		       mouse events until mouseReleased. */
		    Point          componentPoint = SwingUtilities.convertPoint
			(tree, new Point(event.getX(), event.getY()),
			 editingComponent);

		    /* Create an instance of BasicTreeMouseListener to handle
		       passing the mouse/motion events to the necessary
		       component. */
		    // We really want similar behavior to getMouseEventTarget,
		    // but it is package private.
		    Component activeComponent = SwingUtilities.
			            getDeepestComponentAt(editingComponent,
				       componentPoint.x, componentPoint.y);
		    if (activeComponent != null) {
                        MouseInputHandler handler =
                            new MouseInputHandler(tree, activeComponent,
                                                  event, focusedComponent);

                        if (releaseEvent != null) {
                            handler.mouseReleased(releaseEvent);
                        }

                        selectAll = false;
		    }
		}
                if (selectAll && focusedComponent instanceof JTextField) {
                    ((JTextField)focusedComponent).selectAll();
                }
		return true;
	    }
	    else
		editingComponent = null;
	}
	return false;
    }

    //
    // Following are primarily for handling mouse events.
    //

    /**
     * If the <code>mous